What if you don't have a Sim card do you still need one to switch over to straight talk?



You mean your phone does not use a SIM card at all or you just don't have one? If you don't have one now, you can get one from Straight Talk, as long as your MetroPCS phone is unlocked for use on other carriers. If it does not even use a SIM card, contact Straight Talk and see if they can activate it.